Here is an interesting neuropsychiatric disorder which I think that everyone suffers to one degree or the other, some poor souls worse than others.

Bothersome sounds include: slurping, throat-clearing, people clipping their nails, brushing their teeth, chewing crushed ice, eating, drinking, breathing, sniffing, talking, sneezing, yawning, walking, chewing gum, laughing, snoring, typing on a keyboard, coughing, humming, whistling, singing, saying certain consonants, repetitive sounds ...

Not that I break out into a cold sweat, but getting pretty irritated about something so very trivial is something to be careful about.